Made MENU_HELP_URL something that can be overridden in config/site.php
Made MENU_HELP_URL something that can be overridden in config/site.php

git-svn-id: http://svn.concrete5.org/svn/concrete5@441 b0551a0c-1e16-4222-a7d5-975db1aca215

Former-commit-id: 57de0b43365c72dc2016f5f45a3ff5934bc9eae7
biplobice/concrete5,biplobice/concrete5,MrKarlDilkington/concrete5,acliss19xx/concrete5,haeflimi/concrete5,rikzuiderlicht/concrete5,acliss19xx/concrete5,mainio/concrete5,deek87/concrete5,a3020/concrete5,triplei/concrete5-8,hissy/concrete5,concrete5/concrete5,biplobice/concrete5,deek87/concrete5,KorvinSzanto/concrete5,jaromirdalecky/concrete5,olsgreen/concrete5,biplobice/concrete5,hissy/concrete5,concrete5/concrete5,hissy/concrete5,MrKarlDilkington/concrete5,acliss19xx/concrete5,KorvinSzanto/concrete5,mlocati/concrete5,triplei/concrete5-8,mainio/concrete5,jaromirdalecky/concrete5,olsgreen/concrete5,concrete5/concrete5,a3020/concrete5,mlocati/concrete5,concrete5/concrete5,deek87/concrete5,mainio/concrete5,hissy/concrete5,haeflimi/concrete5,rikzuiderlicht/concrete5,mlocati/concrete5,haeflimi/concrete5,mlocati/concrete5,jaromirdalecky/concrete5,rikzuiderlicht/concrete5,triplei/concrete5-8,haeflimi/concrete5,deek87/concrete5,jaromirdalecky/concrete5,olsgreen/concrete5,KorvinSzanto/concrete5,MrKarlDilkington/concrete5